From 7477d51305f2daf410f19c476aee882f2cf9c560 Mon Sep 17 00:00:00 2001
From: Adam Kwolek <adam.kwolek@intel.com>
Date: Thu, 6 Jan 2011 18:29:03 +1100
Subject: [PATCH] FIX: Use sysfs to change array parameters

For external metadata parameters has to be changed via sysfs.
i.e. change of raid_disks requires handshake mdmon<->md (md_allow_write())

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---
 Grow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Grow.c b/Grow.c
index 66b8efb..36bb7de 100644
--- a/Grow.c
+++ b/Grow.c
@@ -1891,7 +1891,8 @@ static int reshape_array(char *container, int fd, char *devname,
 	sync_metadata(st);
 
 	if (info->array.chunk_size == info->new_chunk &&
-	    reshape.before.layout == reshape.after.layout) {
+	    reshape.before.layout == reshape.after.layout &&
+	    st->ss->external == 0) {
 		array.raid_disks = reshape.after.data_disks + reshape.parity;
 		if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) {
 			int err = errno;